Add ImageDescription pydantic model for the OCR pipeline

Author: marwan37

omni-reader/schemas/image_description.py

@@ -0,0 +1,13 @@
+"""This module contains the schema for the OCR results."""
+
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+
+class ImageDescription(BaseModel):
+    """Base model for OCR results."""
+
+    raw_text: str = Field(description="Extracted text from the image")
+    description: str = Field(description="Description of the image")
+    entities: Optional[List[str]] = Field(default=None, description="List of entities found in the image")